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Titanium alloy surface high-temperature-resisting coating and preparation method thereof

A titanium alloy, high temperature resistant technology, applied in metal material coating process, coating and other directions, can solve the problem of low coating hardness and wear resistance, coating thickness, hardness, wear resistance, high temperature oxidation resistance difficult Balanced improvement, limitations and other issues, to achieve the effect of increased coating thickness, excellent high temperature oxidation resistance, and uniform mechanical properties

Active Publication Date: 2018-06-29
QINGDAO BINHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coating preparation steps include: titanium alloy surface pretreatment, powder preparation and ball milling, powder presetting, powder laser sintering, coating heat treatment, oxidation resistance test and microstructure analysis. And wear resistance is not high, which limits the application of this method as an anti-wear coating
[0007] In summary, the existing titanium alloy surface coatings still have the problem of difficulty in improving the coating thickness, hardness, wear resistance, and high temperature oxidation resistance in a balanced manner. Therefore, it is necessary to develop a new composition system for titanium alloy surface coatings. and its preparation method, which has important practical significance for the further popularization and application of titanium alloys

Method used

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  • Titanium alloy surface high-temperature-resisting coating and preparation method thereof
  • Titanium alloy surface high-temperature-resisting coating and preparation method thereof
  • Titanium alloy surface high-temperature-resisting coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A method for preparing a high temperature resistant coating on a titanium alloy surface, comprising the following steps:

[0047] (1) The raw material and proportion of the coating are: 65% Al-20% Nb-10% Si-5% B, and the powder is mixed evenly with a ball mill for use.

[0048] (2) Preparation of titanium alloy matrix material: the Ti-6Al-4V titanium alloy was polished with sandpaper to expose the metallic luster, the grease on the surface was removed with acetone, ultrasonically cleaned in alcohol, and dried for later use.

[0049] (3) Pass high-purity argon gas into the bottom of the semi-closed container, so that the entire container is an argon atmosphere.

[0050] (4) Presetting the powder in step (1) on the surface of the alloy in step (2), with a preset thickness of 0.8-1.0mm. Place the pre-powdered sample on a fixed step in the container.

[0051] (5) Preheating with laser beam scanning, using CO 2 The gas laser performs a laser alloying test on the sample pr...

Embodiment 2

[0053] Same as Example 1, the difference lies in: the coating raw material and the proportion are: 60%Al-20%Nb-10%Si-10%B.

Embodiment 3

[0055] Same as Example 1, the difference lies in: the original coating material and the proportion are: 55%Al-20%Nb-10%Si-15%B.

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Abstract

The invention relates to a titanium alloy surface high-temperature-resisting coating and a preparation method thereof. The ingredient system of the original raw materials of the coating is (45-750%Al-(10-20)%Nb-(5-20)%Si-(0-15)%B-(0-20)%B4C-(0-10)%C. The manner of laser surface alloying is adopted, the in-situ generated high-temperature-resisting coating is prepared on the surface of a titanium alloy and is subjected to typical metallurgical bonding with a base body, and the coating has excellent high temperature oxidation and abrasion resistance; and meanwhile the thickness of the coating isgreatly increased, the problem that the thickness, hardness and abrasion resistance of the coating can hardly be improved in balance in the prior art is solved well, and good application prospects areachieved.

Description

technical field [0001] The invention belongs to the technical field of surface modification of metal materials, and in particular relates to a high-temperature-resistant coating on the surface of a titanium alloy with excellent high-temperature oxidation and wear resistance and a preparation method thereof. Background technique [0002] Titanium and titanium alloys have low density, high specific strength, excellent corrosion resistance, and non-magnetic properties, and have four unique functions of shape memory, superconductivity, hydrogen storage, and biocompatibility. They are easy to form and weld, and are widely used in aviation Aerospace, ships, military industry, metallurgy, chemical industry, seawater desalination, light industry, environmental protection and medical equipment and other fields have created huge economic and social benefits, occupying an important position and role in national economic development and national defense. Compared with nickel-based super...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 戴景杰韩洪发张红霞王阿敏张年龙李守英王晓燕孙彩霞
Owner QINGDAO BINHAI UNIV
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